I got a chance to get a few games in with them over the past weekend and I like them. I think they used to be better, but they are still good.
My first game they actually didn't do much for me against high elves. It seemed like I always over or under shot. One did support me in a charge against a Star Dragon.
My next game against the dwarves they did real well. I had two of them go up one flank with 10 skirmishing skinks with BP, and they flanked a small dwarf warrior block that charged my skinks and helped take them out, they then wreaked havoc on his hill with warmachines and thunderers.
They also did well against the Dark Elves taking out 4 Cold One Knights in one shot.
I guess they are pretty versatile and can be used in shooting or combat, I just wish they had an exact range or that the template blew through things in stead of over.